Immunization of a wild koala population with a recombinant Chlamydia pecorum Major Outer Membrane Protein (MOMP) or Polymorphic Membrane Protein (PMP) based vaccine: New insights into immune response, protection and clearance
Publication Date
June 02, 2017
Authors
Marion Desclozeaux, Amy Robbins, Martina Jelocnik, Shahneaz Ali Khan, et al
Volume
12
Issue
6
Pages
e0178786
DOI
https://dx.plos.org/10.1371/journal.pone.0178786
Publisher URL
http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0178786
Scopus
85020211607
Mendeley
http://www.mendeley.com/research/immunization-wild-koala-population-recombinant-chlamydia-pecorum-major-outer-membrane-protein-momp-p
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Mendeley | Further Information

{"title"=>"Immunization of a wild koala population with a recombinant Chlamydia pecorum Major Outer Membrane Protein (MOMP) or Polymorphic Membrane Protein (PMP) based vaccine: New insights into immune response, protection and clearance", "type"=>"journal", "authors"=>[{"first_name"=>"Marion", "last_name"=>"Desclozeaux", "scopus_author_id"=>"57194227111"}, {"first_name"=>"Amy", "last_name"=>"Robbins", "scopus_author_id"=>"57194442278"}, {"first_name"=>"Martina", "last_name"=>"Jelocnik", "scopus_author_id"=>"55801319900"}, {"first_name"=>"Shahneaz Ali", "last_name"=>"Khan", "scopus_author_id"=>"36699635100"}, {"first_name"=>"Jon", "last_name"=>"Hanger", "scopus_author_id"=>"6506920461"}, {"first_name"=>"Volker", "last_name"=>"Gerdts", "scopus_author_id"=>"6602288881"}, {"first_name"=>"Andrew", "last_name"=>"Potter", "scopus_author_id"=>"35461198600"}, {"first_name"=>"Adam", "last_name"=>"Polkinghorne", "scopus_author_id"=>"6507185275"}, {"first_name"=>"Peter", "last_name"=>"Timms", "scopus_author_id"=>"7006114444"}], "year"=>2017, "source"=>"PLoS ONE", "identifiers"=>{"isbn"=>"1111111111", "pui"=>"616560043", "scopus"=>"2-s2.0-85020211607", "doi"=>"10.1371/journal.pone.0178786", "sgr"=>"85020211607", "issn"=>"19326203"}, "id"=>"a0b45698-617c-3b3c-9883-c62540755d25", "abstract"=>"© 2017 Desclozeaux et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. We assessed the effects of two different single-dose anti-Chlamydia pecorum (C. pecorum) vaccines (containing either Major Outer Membrane Protein (3MOMP) or Polymorphic Membrane Protein (Pmp) as antigens) on the immune response of a group of wild koalas. Both vaccines elicited a systemic humoral response as seen by the production of anti-chlamydial IgG antibodies in more than 90% of vaccinated koalas. A mucosal immune response was also observed, with an increase in Chlamydia-specific mucosal IgG and/or IgA antibodies in some koalas post-vaccination. Both vaccines elicited a cell-mediated immune response as measured by the production of the cytokines IFN-γ and IL-17 post-vaccination. To determine the level of protection provided by the vaccines under natural conditions we assessed C. pecorum infection loads and chlamydial disease status of all vaccinated koalas pre-and post-vaccination, compared to a non-vaccinated cohort from the same habitat. The MOMP vaccinated koalas that were infected on the day of vaccination showed significant clearance of their infection at 6 months post-vaccination. In contrast, the number of new infections in the PMP vaccine was similar to the control group, with some koalas progressing to disease. Genotyping of the ompA gene from the C. pecorum strains infecting the vaccinated animals, identified genetic variants of ompA-F genotype and a new genotype ompA-O. We found that those animals that were the least well protected became infected with strains of C. pecorum not covered by the vaccine. In conclusion, a single dose vaccine formulated with either recombinant PmpG or MOMP can elicit both cell-mediated and humoral (systemic and mucosal) immune responses, with the MOMP vaccine showing clearance of infection in all infected koalas. Although the capability of our vaccines to stimulate an adaptive response and be protective needs to be fully evaluated, this work illustrates the necessity to combine epitopes most relevant to a large panel of variable strains with an efficient adjuvant.", "link"=>"http://www.mendeley.com/research/immunization-wild-koala-population-recombinant-chlamydia-pecorum-major-outer-membrane-protein-momp-p", "reader_count"=>7, "reader_count_by_academic_status"=>{"Unspecified"=>3, "Student > Postgraduate"=>1, "Student > Bachelor"=>2, "Student > Ph. D. Student"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>3, "Student > Postgraduate"=>1, "Student > Bachelor"=>2, "Student > Ph. D. Student"=>1}, "reader_count_by_subject_area"=>{"Unspecified"=>3, "Medicine and Dentistry"=>1, "Agricultural and Biological Sciences"=>3}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>3}, "Unspecified"=>{"Unspecified"=>3}}, "group_count"=>0}

Scopus | Further Information

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